Circulating-exhauster.



N. M. LA PORTE. CIRCULATING EX'HAUSTER:-

APPLICATION FIUED APR-20,1915.

Pmma May 16, 1916.

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HERBERT M. LA POE/TE, 0F BALTIMORE, MALEZYLANIJ, ASSIiGNDT-Et 1'0 T133133 CQOLING SYSTEMS COMPANY, A CORPORATION OF MARYLAND.

CIRCULATING-EXHAUfiTEE.

Specification of Letters Patent.

Application filed Apri120, 1915. Eeriallto. 222,849.

To all whom it may concern:

Be it known that I, Nonnnnr M. LA Pours, a citizen of the United States of America, residing in the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Circulating-Exhausters, of which the following is a specilication.

This invention relates to a circulating device for the cooling water used in connection with internal combustion engines to prevent overheating of the cylinder walls.

lVhile this apparatus may be applied to the various types of engines, marine and stationary, as well as those installed in road vehicles, it is illustrated as applied to an automobile engine. The circulator operates on a principle similar in some waysto that of the device described in my previous application for U. S. Patent Ser. No. 876,184, now

pending. The principle of operation coin-- inch to the two devices consists in leading a portion of the exhaust. from the eX- 'haust manifold to a nozzle in the circulating system which is disposed in the direction of circulation. In the previous application this has been shown in the lower radiator connection where it is submerged at all times even though the water content or thecooling system is diminished to a small fraction of the normal water supply. The exhaust escaping from the nozzle impart velocity to the water and serve most efficiently as a circulating medium, the effect of which varies to correspond to the heating effect. This device has been remarkably successful in its operation but objections to it have been. raised in certain. quarters on the ground that a portion of the grease and carbon from the exhaust is introduced into the cooling water and thus serves to foul the water jacket.

In order to avoid any possibility of fouling the cylim or jacket, I have provided a, ci'rculator so arranged that the exhaust gases, in so far as they are introduced into the cooling system, are released at a point near the surface of the water in the radiator and directed toward the surface sothat any oil or carbon which is discharged floats up hmnedlately and as tl later in operation lriu'uicntly raises the level of the Water and causes a small quantity to overflow, the oil and carbon are thus thrown oli without being brought into contact with the radiator tubes or the inside of the cylinder aclre' It has also been suggested that the introduction of hot exhaust gases into the circulator system would have an effect opposite to the cooling effect intended, but in the present nstance, the gases escape almost iniinedlately from the Water into the air pace in the top of the radiator from which. thev pass into the open air through the overflow pipe, and cannot have any appreciable effect in heating the water.

To accomplish the results described, Ti place a. nozzle in the sage leading :trom the water jacket tothe top of the radiator and turn the nozzle in the direction or the radiator. However, it is a well-known fact that owing to evaporation and leakage,

recedes to point the water level frequently well below the top connection and unless spc cial provision is made :lor this condition,cir-- culation will not he conti ed but *ill be interrupted whenever the level he recedes below the gas nozzle. To overcome this defect produce a device which operative at increased range oi water so level, 1 reduce the diameter oi? the Water pipe just beyond the nozzle so that the nozzle is dirmeted into a sharply constricted area of the water pipe. The proportions of the circulator at this point are such that it is effective not only when supplied with water to the level of the nozzle, but it is also cites tive when the water lt'alls below the nozzle to exhaust the and proi'luce a vacuum and suck the water up to the nozzle tron'i whence it is forced into the top of the radiator, thus continuing tne circulation even wide variation of water level.

tioniuch of: an engine radiator adapt ed for use on a road vehicle as it ctry 9 to a complete comprehension of my de ice is shown in the accompanying ran ings in which Figure l is an elevation the circulator in. longitudinal cross section; and Fig. 9 is a detail of thecirculator.

Referring to the drawing runners have shown an engine casti" g; l usual Water jacket, a radiator co tion 3 leading" from the be tinn jacket to the bottom oi. top connection, 4. in th have suhsl'iituted for t hose at this point, a single tube having flanges 5 at the ends adapted to be bolted to the radiator at one end and to the cylinder casting 1 at the other end forming aconnection between the top of the water acket and the top of the cylinder. nection 4: is-reduced in cross-section intermediately at 6 forming a constricted portion 7 into which the nozzle 8 is directed. This nozzle is connected by a small tube 9 with the exhaust manifold at 10 and has any suitable means, as a non-return ball valve 11, for preventing back flow of the water from the radiator to the manifold. In the preferred form of the invention, the constricted portion 7 of the radiator connection is made sufficiently small so that the action of the exhaust gases passing at high yelocity from the nozzle through this constricted opening 7 will,in case the water level is below the radiator connectiom'cntrain sufiicient air to create a vacuum in the air space over the water and thus cause the water to rise to the level of the nozzle so that it will be forced through the constri ted opening and upward, causing a continuous circulation in the system.

It will be apparent that with the gases released at a point near the surface of the water in the radiator and in a current directed toward that surface, any'carbon and oil which may be discharged will pass directly to the surface of the water and, being lighter than the water, will float. Further, the violent circulation produced in hillclimbing and the like, is suflieient at normal water level to raise the water and cause The top cona small amount to overflow. In this way all floating particles and scum are discharged before they have time to 'colleotin appreciable quantities or become deposited On the radiator surface. Also the exhaust gases are not carried through the system to any extent but pass almost immediately to the surface of the water and out through the overflow pipe so that no heating from this source can possibly take place.

Having thus described my inventioinwhat I claim and desire to secure by Letters Pat-- ent is:

An automobile accessory in the form of a circulating exhauster consisting of a tubu lar member-to be used as a substitute for the radiator connect-ion which extends from the top of the water jacket to the top of the radiator, the said tubular member having a constricted area forming a- Water nozzle disposed toward the radiator a nozzle cooperating with and directed into the water nozzle, means connectingthe gas nozzle to the exhaust manifold, the water nozzle and gas nozzle forming an ejector which carries the water from the water jacket to the radiator and entrains and forces the air through the radiator connection when the water level drops below normal, thus drawing the water up to the nozzle and forcing it forward to the radiator and continuing the circulation.

Signed by me at Baltimore, lvitaryland, this 16th day of April 1915.

NORBERT M. LA FORTE. lVitnesses EDWARD L. BASH, AnionG. DONEGAN. 

